Carrier High-Wall Ductless Split Systems

Installation Instruction

NOTE: Read the entire instruction manual before starting the installation.

Please contact your dealer if any parts are damaged or missing.

?️ Safety Considerations

Installing, starting up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start-up, and service this equipment.

Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be performed by trained service personnel.

When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment.

Follow all safety codes. Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher nearby when brazing. Use care in handling, rigging, and setting bulky equipment.

Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes and current editions of the National Electrical Code (NEC) NFPA 70. In Canada, refer to current editions of the Canadian electrical code CSA 22.1.

Recognize safety information. This is the safety-alert symbol ⚠️. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

Failure to follow this warning could result in personal injury or death.

Before installing, modifying, or servicing system, main electrical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label.

Failure to follow this caution may result in equipment damage or improper operation.

Do not bury more than 36 in. (914 mm) of refrigerant pipe in the ground. If any section of pipe is buried, there must be a 6 in. (152 mm) vertical rise to the valve connections on the outdoor units. If more than the recommended length is buried, refrigerant may migrate to the cooler buried section during extended periods of system shutdown. This causes refrigerant slugging and could possibly damage the compressor at start-up.

System Requirements

Allow sufficient space for airflow and servicing unit. See Figure 6 for minimum required distances between unit and walls or ceilings.

Piping

IMPORTANT: Both refrigerant lines must be insulated separately.

• Minimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m).
• The following maximum lengths are allowed:

• The following are the piping sizes.

Refrigerant Charge

* Charge is for piping that runs up to 25 ft. (7.6 m)

** For piping runs greater than 25 ft. (7.6 m), add specified amount of charge per foot of extra piping, up to the allowable length.

*** EXV - Electronic Expansion Device, Capillary tubes are used as metering devices

Dimensions

Indoor Unit Dimensions

Figure 1 shows the dimensions of the indoor unit.

Figure 1 - Indoor Unit Dimensions

Outdoor Unit Dimensions

Figures 2 through 5 illustrate the dimensions for the outdoor units for various models and voltages.

Figure 2 shows the dimensions for the 9K and 12K 115V models, with a net operating weight of 75 lbs. / 34 kg.

Figure 3 shows the dimensions for the 12K 230V model, with a net operating weight of 63.8 lbs. / 30 kg.

Figure 4 shows the dimensions for the 18K and 24K models, with a net operating weight of 112.2 lbs. / 51 kg.

Figure 5 shows the dimensions for the 30K and 36K models, with net operating weights of 154 lbs. / 70 kg (30K) and 161 lbs. / 73 kg (36K).

Figure 2 - 9K and 12K 115V (Net Operating Weight: 75 lbs. / 34 kg)

Figure 3 - 12K 230V (Net Operating Weight: 63.8 lbs. / 30 kg)

Figure 4 - 18K and 24K (Net Operating Weight: 112.2 lbs. / 51 kg)

Figure 5 - 30K and 36K (Net Operating Weight: 30K = 154 lbs. / 70 kg; 36K = 161 lbs. / 73 kg)

Clearances

Figure 6 illustrates the required clearances for both indoor and outdoor units. These dimensions are necessary for correct installation and represent the minimum permissible distances to adjacent structures.

Figure 6 - Indoor and Outdoor Unit Clearances

Installation Guide

Ideal Installation Locations

Indoor Unit

• A location where there are no obstacles near inlet and outlet area.
• A location which can bear the weight of the indoor unit.
• Do not install indoor units near a direct source of heat such as direct sunlight or a heating appliance.
• A location which provides appropriate clearances as outlined in Figure 6. Ensure sufficient distance for routine maintenance. The installation site should be 66 in (1676 mm) or more above the floor.
• Select a place away from potential electronic interference.
• Select a place where the filter can be easily removed.

Outdoor Unit

• A location which is convenient for installation and not exposed to strong wind.
• A location which can bear the weight of the outdoor unit and where the outdoor unit can be mounted in a level position.
• A location which provides appropriate clearances as outlined in Figure 6.
• Do not install indoor or outdoor units in a location with special environmental conditions.
• Ensure the outdoor unit is installed in accordance with the installation instructions and is convenient for maintenance and repair.
• Refer to the refrigerant piping table for the maximum height difference between indoor and outdoor units and the maximum length of the connecting tubing.

Indoor Unit Installation

Install Mounting Plate

1. Carefully remove the mounting plate from the unit box.
2. The mounting plate should be located horizontally and level on the wall. Maintain all minimum spacings shown in Figures 7 through 10.
3. If the wall is block, brick, concrete, or similar material, drill 0.2" (5 mm) diameter holes and insert anchors for the appropriate mounting screws.
4. Attach the mounting plate to the wall.

Figure 7 - 09 and 12K Mounting Plate Spacing

Figure 8 - 18k Mounting Plate Spacing

Figure 9 - 24k Mounting Plate Spacing

Figure 10 - 30/36k Mounting Plate Spacing

Figure 11 - Mounting Plate Spacing

Drill Hole in Wall for Interconnecting Piping, Drain and Wiring

Refrigerant Line Routing

The refrigerant lines may be routed in any of the four directions shown in Figure 12. For maximum serviceability, it is recommended to have refrigerant line flare connections and the drain connection on the outside of the wall where the fan coil is mounted.

Figure 12 - Refrigerant Line Routing

If piping is going through the back:

1. Determine pipe hole position using the mounting plate as a template. Drill pipe hole diameter per the chart below. The outside pipe hole should be 1/2-in. (13 mm) lower than the inside pipe hole, creating a slight downward slant (see Figure 13). If piping is exiting from the left rear, it is recommended to field-fabricate piping extensions to bring flare connections to the outside of the wall.

Figure 13 - Drill Holes

If piping is going through the right or left side:

1. Use a small saw blade to carefully remove the corresponding plastic covering on the side panel and drill the appropriate size hole where the pipe will pass through the wall. See Figure 19.
2. Remove knockout 1 to run only the wiring. Remove knockout 1 and 2, or knockout 1, 2, and 3 if running both piping and wiring through the side of the unit. See Figure 12.

NOTE: If required, a condensate pump is available for the application.

Outdoor Unit Installation

1. Use a rigid base to support the unit in a level position.
2. Locate the outdoor unit and connect piping and wiring.

Excessive torque can break a flare nut depending on installation conditions.

Piping Connections to Outdoor Unit

IMPORTANT: Use refrigeration grade tubing ONLY. Use of other types of tubing will void the manufacturer's warranty.

Ensure there is enough piping to cover the required length between the outdoor and indoor unit. Only use piping suitable for high side pressure for both high side and low side connections.

Piping Guide:

• Do not open service valves or remove protective caps from tubing ends until all connections are made.
• Bend tubing with bending tools to avoid kinks and flat spots.
• Keep the tubing free of dirt, sand, moisture, and other contaminants to avoid damaging the refrigerant system.
• Avoid sags in the suction line to prevent the formation of oil traps. Insulate each tube with minimum 3/8-in. (10 mm) wall thermal pipe insulation. Inserting the tubing into the insulation before making connections will save time and improve installation quality.

1. Remove the service valve cover if provided with the unit.
2. Cut tubing with a tubing cutter.
3. Install the correct size flare nut onto the tubing and make the flare connection.
4. Apply a small amount of refrigerant oil to the flare connection on the tubing.
5. Properly align the tubing with the service valve.
6. Tighten the flare nut and finish the installation using two wrenches as shown in Figure 14.

Figure 14 - Tighten Flare Nut

Figure 15 - High Wind Installation

Outdoor Unit Wiring Connections

1. Mount the outdoor power disconnect.
2. Run power wiring from the main box to the disconnect per NEC and local codes. Set the outdoor unit in place.
3. Remove the field wiring cover from the unit by removing screws.
4. Connect conduit to the conduit panel. (See Figure 16)
5. Properly connect both power supply and control lines to the terminal block per the connection diagram.
6. Ground the unit in accordance with NEC and local electrical codes.
7. Use lock nuts to secure the conduit.
8. Reinstall the field wiring cover.

Figure 16 - Field Wiring

Be sure to comply with local codes while running wire from the indoor unit to the outdoor unit. Every wire must be connected firmly. Loose wiring may cause terminal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, be sure all wiring is tightly connected. No wire should be allowed to touch refrigerant tubing, compressor, or any moving parts. Disconnecting means must be provided and shall be located within sight and readily accessible from the air conditioner. Connecting cable with conduit shall be routed through a hole in the conduit panel.

INSTALL ALL POWER, INTERCONNECTING WIRING, AND PIPING TO INDOOR UNIT.

1. Run interconnecting piping and wiring from the outdoor unit to the indoor unit.
2. Pass the interconnecting cable through the hole in the wall (outside to inside).
3. Lift the indoor unit into position and route piping and drain through the hole in the wall (inside to outside). Fit the interconnecting wiring into the back side of the indoor unit.
4. Hang the indoor unit on the upper hooks of the wall mounting plate (as shown in Figures 17 and 20).

Figure 17 - Hanging Indoor Unit

Figure 18 - Field Wiring Cover

Figure 19 - Remove Knockouts

Figure 20 - Hang Indoor Unit

6. Pull the interconnecting wire up from the back of the indoor unit and position it close to the terminal block on the indoor unit.
7. Push the bottom of the indoor unit onto the mounting plate to complete the wall mount.
8. Connect wiring from the outdoor unit per the connection diagram (see Figure 26).

NOTE: Polarity of power wires must match the original connection on the outdoor unit.

9. Replace the field wiring cover and close the front cover of the indoor unit.
10. Connect refrigerant piping and drain line outside of the indoor unit. Refer to Figure 14 for proper installation of flare connections. Complete pipe insulation at the flare connection, then fasten piping and wiring to the wall as required. Completely seal the hole in the wall.

System Vacuum and Charge

Using Vacuum Pump

Refrigerant tubes and the indoor coil should be evacuated using the recommended deep vacuum method of 500 microns. The alternate triple evacuation method may be used if the procedure outlined below is followed. Always break a vacuum with dry nitrogen.

1. Completely tighten flare nuts A, B, C, D. Connect the manifold gauge charge hose to a charge port of the low side service valve. (See Figure 21.)
2. Connect the charge hose to the vacuum pump.
3. Fully open the low side of the manifold gauge. (See Figure 22)
4. Start the vacuum pump.
5. Evacuate using either the deep vacuum or triple evacuation method.
6. After evacuation is complete, fully close the low side of the manifold gauge and stop the vacuum pump.
7. The factory charge contained in the outdoor unit is sufficient for up to 25 ft. (8 m) of line length. For refrigerant lines longer than 25 ft (8 m), add 0.1 oz. per foot of extra piping up to the maximum allowable length.
8. Disconnect the charge hose from the charge connection of the low side service valve.
9. Fully open service valves B and A.
10. Securely tighten caps of service valves.

Figure 21 - Service Valve

Figure 22 - Manifold

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gauge capable of accurately measuring this vacuum depth. The deep vacuum method is the most positive way of assuring a system is free of air and liquid water. (See Figure 23)

Figure 23 - Deep Vacuum Graph

Triple Evacuation Method

The triple evacuation method should only be used when the vacuum pump is only capable of pumping down to 28 in. of mercury vacuum and the system does not contain any liquid water. Refer to Figure 24 and proceed as follows:

1. Pump the system down to 28 in. of mercury and allow the pump to continue operating for an additional 15 minutes.
2. Close service valves and shut off the vacuum pump.
3. Connect a nitrogen cylinder and regulator to the system and open until the system pressure is 2 psig.
4. Close the service valve and allow the system to stand for 1 hour. During this time, dry nitrogen will diffuse throughout the system, absorbing moisture.
5. Repeat this procedure as indicated in Figure 24. The system will then be free of any contaminants and water vapor.

Figure 24 - Triple Evacuation Method

Final Tubing Check

IMPORTANT: Check to ensure factory tubing on both indoor and outdoor units has not shifted during shipment. Ensure tubes are not rubbing against each other or any sheet metal. Pay close attention to feeder tubes, making sure wire ties on feeder tubes are secure and tight.

Start-Up

Test Operation

Perform test operation after completing gas leak and electrical safety checks.

1. Push the "ON/OFF" button on the Remote Control to begin testing.

NOTE: A protection feature prevents the air conditioner from being activated for approximately 3 minutes.

2. Push the MODE button, select COOLING, HEATING, or FAN mode to check if all functions work correctly.

System Checks

1. Conceal the tubing where possible.
2. Make sure that the drain tube slopes downward along its entire length.
3. Ensure all tubing and connections are properly insulated.
4. Fasten tubes to the outside wall, when possible.
5. Seal the hole through which the cables and tubing pass.

Indoor Unit

• Do all Remote Control buttons function properly?
• Do the display panel lights work properly?
• Does the air deflection louver function properly?
• Does the drain work?

Outdoor Unit

• Are there unusual noises or vibrations during operation?

Explain Following Items To Customer With The Aid Of The Owner's Manual:

1. How to turn the air conditioner on and off; selecting COOLING, HEATING, and other operating modes; setting a desired temperature; setting the timer to automatically start and stop air conditioner operation; and all other features of the Remote Control and display panel.
2. How to remove and clean the air filter.
3. How to set the air deflection louver.
4. Explain care and maintenance.
5. Present the Owner's Manual and installation instructions to the customer.

Installation and Maintenance of Filter

1. Grasp the front panel by its two ends, lift the panel, and then remove the air filter.
2. Install a clean air filter along the arrow direction and close the panel.

Figure 25 - Install Air Filter

Wiring Diagrams

Figure 26 provides unit wiring diagrams for various configurations.

Figure 26 - Unit Wiring Diagrams

Troubleshooting

This unit has on-board diagnostics. Error codes will appear on the LED display on the front panel of the indoor unit in place of the temperature display. Error codes are also displayed on the outdoor unit microprocessor board with colored LED lights. The table below explains the error codes for both units.

Diagnostic Codes for 38/40GVC/Q 9k / 12k, 115v

Diagnostic Codes for 38/40GVC/Q 12K, 230v

Diagnostic Codes for 38/40GVC/Q 18k-24k, 230v

Diagnostic Codes for 38/40GVC/Q 30k-36k, 230v